From the latest AP story: "According to the second official, the suspect drove to the scene of the shootings in his mother's car. Three guns were found at the scene — a Glock and a Sig Sauer, both pistols — and a .223-caliber rifle. The rifle was recovered from the back of a car at the school. The two pistols were recovered from inside the school."

More from the AP: The shootings instantly brought to mind episodes such as the Columbine High School massacre that killed 15 in 1999 and the July shootings at a movie theater in Aurora, Colo., that left 12 dead.

"You go to a movie theater in Aurora and all of a sudden your life is taken," Columbine principal Frank DeAngelis said. "You're at a shopping mall in Portland, Ore., and your life is taken. This morning, when parents kissed their kids goodbye knowing that they are going to be home to celebrate the holiday season coming up, you don't expect this to happen. I think as a society, we need to come together. It has to stop, these senseless deaths."

"We'll do whatever we can to overcome this event. We will get through it. But this is a terrible time for this community and these families. Our police personnel are doing their uptmost to clear this situation as soon as possible."

Fox News says is now saying that the guns belonged to Nancy Lanza, whom Adam Lanza shot in the face at their Newtown home before driving her car to Sandy Hook Elementary School, where the massacre occurred and where he killed himself.